diff --git a/.clang-format b/.clang-format new file mode 100644 index 0000000..8b094d2 --- /dev/null +++ b/.clang-format @@ -0,0 +1,10 @@ +Language: Cpp +BasedOnStyle: Google +ColumnLimit: 120 +DerivePointerAlignment: false +PointerAlignment: Left +SortIncludes: Never +IncludeBlocks: Preserve +IndentPPDirectives: AfterHash +ForEachMacros: [''] +SpacesBeforeTrailingComments: 2 diff --git a/.clang-tidy b/.clang-tidy new file mode 100644 index 0000000..4156cde --- /dev/null +++ b/.clang-tidy @@ -0,0 +1,160 @@ +--- +Checks: '-*, +bugprone-argument-comment, +bugprone-assert-side-effect, +bugprone-bad-signal-to-kill-thread, +bugprone-branch-clone, +bugprone-copy-constructor-init, +bugprone-dangling-handle, +bugprone-dynamic-static-initializers, +bugprone-fold-init-type, +bugprone-forward-declaration-namespace, +bugprone-forwarding-reference-overload, +bugprone-inaccurate-erase, +bugprone-incorrect-roundings, +bugprone-integer-division, +bugprone-lambda-function-name, +bugprone-macro-parentheses, +bugprone-macro-repeated-side-effects, +bugprone-misplaced-operator-in-strlen-in-alloc, +bugprone-misplaced-pointer-arithmetic-in-alloc, +bugprone-misplaced-widening-cast, +bugprone-move-forwarding-reference, +bugprone-multiple-statement-macro, +bugprone-no-escape, +bugprone-parent-virtual-call, +bugprone-posix-return, +bugprone-reserved-identifier, +bugprone-sizeof-container, +bugprone-sizeof-expression, +bugprone-spuriously-wake-up-functions, +bugprone-string-constructor, +bugprone-string-integer-assignment, +bugprone-string-literal-with-embedded-nul, +bugprone-suspicious-enum-usage, +bugprone-suspicious-include, +bugprone-suspicious-memset-usage, +bugprone-suspicious-missing-comma, +bugprone-suspicious-semicolon, +bugprone-suspicious-string-compare, +bugprone-suspicious-memory-comparison, +bugprone-suspicious-realloc-usage, +bugprone-swapped-arguments, +bugprone-terminating-continue, +bugprone-throw-keyword-missing, +bugprone-too-small-loop-variable, +bugprone-undefined-memory-manipulation, +bugprone-undelegated-constructor, +bugprone-unhandled-self-assignment, +bugprone-unused-raii, +bugprone-unused-return-value, +bugprone-use-after-move, +bugprone-virtual-near-miss, +cert-dcl21-cpp, +cert-dcl58-cpp, +cert-err34-c, +cert-err52-cpp, +cert-err60-cpp, +cert-flp30-c, +cert-msc50-cpp, +cert-msc51-cpp, +cert-str34-c, +clang-analyzer-core.BitwiseShift, +clang-analyzer-core.CallAndMessage, +clang-analyzer-core.NonNullParamChecker, +clang-analyzer-core.NullDereference, +clang-analyzer-core.StackAddressEscape, +clang-analyzer-core.UndefinedBinaryOperatorResult, +clang-analyzer-core.VLASize, +clang-analyzer-core.uninitialized.Assign, +clang-analyzer-core.uninitialized.Branch, +clang-analyzer-core.uninitialized.CapturedBlockVariable, +clang-analyzer-core.uninitialized.NewArraySize, +clang-analyzer-core.uninitialized.UndefReturn, +clang-analyzer-deadcode.DeadStores, +clang-analyzer-optin.core.EnumCastOutOfRange, +cppcoreguidelines-interfaces-global-init, +cppcoreguidelines-narrowing-conversions, +cppcoreguidelines-pro-type-member-init, +cppcoreguidelines-pro-type-static-cast-downcast, +cppcoreguidelines-slicing, +google-default-arguments, +google-explicit-constructor, +google-runtime-operator, +hicpp-exception-baseclass, +hicpp-multiway-paths-covered, +misc-misplaced-const, +misc-new-delete-overloads, +misc-no-recursion, +misc-non-copyable-objects, +misc-throw-by-value-catch-by-reference, +misc-unconventional-assign-operator, +misc-uniqueptr-reset-release, +modernize-avoid-bind, +modernize-concat-nested-namespaces, +modernize-deprecated-headers, +modernize-deprecated-ios-base-aliases, +modernize-loop-convert, +modernize-make-shared, +modernize-make-unique, +modernize-pass-by-value, +modernize-raw-string-literal, +modernize-redundant-void-arg, +modernize-replace-auto-ptr, +modernize-replace-disallow-copy-and-assign-macro, +modernize-replace-random-shuffle, +modernize-return-braced-init-list, +modernize-shrink-to-fit, +modernize-unary-static-assert, +modernize-use-auto, +modernize-use-bool-literals, +modernize-use-emplace, +modernize-use-equals-default, +modernize-use-equals-delete, +modernize-use-nodiscard, +modernize-use-noexcept, +modernize-use-nullptr, +modernize-use-override, +modernize-use-transparent-functors, +modernize-use-uncaught-exceptions, +mpi-buffer-deref, +mpi-type-mismatch, +openmp-use-default-none, +performance-faster-string-find, +performance-for-range-copy, +performance-implicit-conversion-in-loop, +performance-inefficient-algorithm, +performance-inefficient-string-concatenation, +performance-inefficient-vector-operation, +performance-move-const-arg, +performance-move-constructor-init, +performance-no-automatic-move, +performance-noexcept-move-constructor, +performance-trivially-destructible, +performance-type-promotion-in-math-fn, +performance-unnecessary-copy-initialization, +performance-unnecessary-value-param, +portability-simd-intrinsics, +readability-avoid-const-params-in-decls, +readability-const-return-type, +readability-container-size-empty, +readability-convert-member-functions-to-static, +readability-delete-null-pointer, +readability-deleted-default, +readability-inconsistent-declaration-parameter-name, +readability-make-member-function-const, +readability-misleading-indentation, +readability-misplaced-array-index, +readability-non-const-parameter, +readability-redundant-control-flow, +readability-redundant-declaration, +readability-redundant-function-ptr-dereference, +readability-redundant-smartptr-get, +readability-redundant-string-cstr, +readability-redundant-string-init, +readability-simplify-subscript-expr, +readability-static-accessed-through-instance, +readability-static-definition-in-anonymous-namespace, +readability-string-compare, +readability-uniqueptr-delete-release, +readability-use-anyofallof' diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..abbd96c --- /dev/null +++ b/.gitignore @@ -0,0 +1,10 @@ +# IDEs +.idea +.vscode + +# Build directories +build +cmake-build-* + +# System +.DS_Store diff --git a/.gitmodules b/.gitmodules new file mode 100644 index 0000000..53691ca --- /dev/null +++ b/.gitmodules @@ -0,0 +1,3 @@ +[submodule "external/plthook"] + path = external/plthook + url = git@github.com:kubo/plthook.git diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..3afd0d6 --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,35 @@ +cmake_minimum_required(VERSION 3.22.1) +include(ndk.cmake) +project(adbex C) + +# LTO +cmake_policy(SET CMP0069 NEW) +set(CMAKE_POLICY_DEFAULT_CMP0069 NEW) +include(CheckIPOSupported) +check_ipo_supported(RESULT ipo_supported OUTPUT ipo_supported_output) +if (ipo_supported) + set(CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE TRUE) +else () + message(WARNING "IPO is not supported: ${ipo_supported_output}") +endif () + +# Global options +set(CMAKE_C_VISIBILITY_PRESET hidden) +add_compile_options($<$:-Os>) +add_link_options($<$:-s>) + +# plthook +set(PLTHOOK_PATH external/plthook) +set(PLTHOOK_SRC ${PLTHOOK_PATH}/plthook_elf.c) +add_library(plthook STATIC ${PLTHOOK_SRC}) +target_include_directories(plthook SYSTEM PUBLIC ${PLTHOOK_PATH}) + +# adbex +add_executable(inject inject.c ptrace.c utils.c) +target_link_libraries(inject) + +add_library(adbex_init SHARED adbex_init.c utils.c) +target_link_libraries(adbex_init plthook) + +add_library(adbex_adbd SHARED adbex_adbd.c utils.c) +target_link_libraries(adbex_adbd) diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..3908a54 --- /dev/null +++ b/LICENSE @@ -0,0 +1,675 @@ + + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The 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It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + {project} Copyright (C) {year} {fullname} + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..d9c74ea --- /dev/null +++ b/README.md @@ -0,0 +1,22 @@ +# ADBEx + +## Introduction +An adbd extension used for `adb root` and shell replacement. + +## Prerequisites +Magisk v24+, or KernelSU v0.4.0+ + +> Note that this module is not compatible with ZygiskNext versions lower than 1.0. + +## Install +Install as a module in Magisk/KernelSU manager app. + +## Build +*TODO* + +## Credits +- [tiann/adb_root](https://github.com/tiann/adb_root): Enable adb root in production build device for Android 11+. +- [kubo/plthook](https://github.com/kubo/plthook): Hook function calls by replacing PLT(Procedure Linkage Table) entries. + +## License +This project is licensed under the [GNU General Public Licence, version 3](https://choosealicense.com/licenses/gpl-3.0/). diff --git a/adbex_adbd.c b/adbex_adbd.c new file mode 100644 index 0000000..11933f4 --- /dev/null +++ b/adbex_adbd.c @@ -0,0 +1,137 @@ +#include "utils.h" +#include "prop_info.h" + +#include +#include +#include +#include +#include +#include +#include + +#define LOG_TAG "[adbex][adbd]" + +EXPORT int __android_log_is_debuggable() { return 1; } + +// For Android 9+ +typedef void (*callback_t)(void* cookie, const char* name, const char* value, uint32_t serial); +typedef void (*__system_property_read_callback_t)(const prop_info* pi, callback_t callback, void* cookie); +__system_property_read_callback_t orig___system_property_read_callback; +EXPORT void __system_property_read_callback(const prop_info* pi, callback_t callback, void* cookie) { + if (unlikely(!strcmp(pi->name, "ro.secure"))) { + klog(LOG_TAG, "__system_property_read: replaced ro.secure"); + callback(cookie, pi->name, "0", pi->serial); + } else if (unlikely(!strcmp(pi->name, "service.adb.root"))) { + klog(LOG_TAG, "__system_property_read_callback: replaced service.adb.root"); + callback(cookie, pi->name, "1", pi->serial); + } else if (unlikely(!strcmp(pi->name, "ro.boot.verifiedbootstate"))) { + klog(LOG_TAG, "__system_property_read_callback: replaced ro.boot.verifiedbootstate"); + callback(cookie, pi->name, "orange", pi->serial); + } else if (likely(orig___system_property_read_callback)) { + orig___system_property_read_callback(pi, callback, cookie); + } +} + +// For Android 8+ +typedef int (*__system_property_read_t)(const prop_info* pi, char* name, char* value); +__system_property_read_t orig___system_property_read; +EXPORT int __system_property_read(const prop_info* pi, char* name, char* value) { + if (unlikely(!strcmp(pi->name, "ro.secure"))) { + klog(LOG_TAG, "__system_property_read: replaced ro.secure"); + if (name) strlcpy(name, pi->name, PROP_NAME_MAX); + strcpy(value, "0"); + return (int)strlen("0"); + } else if (unlikely(!strcmp(pi->name, "service.adb.root"))) { + klog(LOG_TAG, "__system_property_read: replaced service.adb.root"); + if (name) strlcpy(name, pi->name, PROP_NAME_MAX); + strcpy(value, "1"); + return (int)strlen("1"); + } else if (unlikely(!strcmp(pi->name, "ro.boot.verifiedbootstate"))) { + klog(LOG_TAG, "__system_property_read: replaced ro.boot.verifiedbootstate"); + if (name) strlcpy(name, pi->name, PROP_NAME_MAX); + strcpy(value, "orange"); + return (int)strlen("orange"); + } else if (likely(orig___system_property_read)) { + return orig___system_property_read(pi, name, value); + } + return 0; +} + +// For Android 7+ +typedef int (*__system_property_get_t)(const char* name, char* value); +__system_property_get_t orig___system_property_get; +EXPORT int __system_property_get(const char* name, char* value) { + if (unlikely(!strcmp(name, "ro.secure"))) { + klog(LOG_TAG, "__system_property_get: replaced ro.secure"); + strcpy(value, "0"); + return (int)strlen("0"); + } else if (unlikely(!strcmp(name, "service.adb.root"))) { + klog(LOG_TAG, "__system_property_get: replaced service.adb.root"); + strcpy(value, "1"); + return (int)strlen("1"); + } else if (unlikely(!strcmp(name, "ro.boot.verifiedbootstate"))) { + klog(LOG_TAG, "__system_property_get: replaced ro.boot.verifiedbootstate"); + strcpy(value, "orange"); + return (int)strlen("orange"); + } else if (likely(orig___system_property_get)) { + return orig___system_property_get(name, value); + } + return 0; +} + +typedef int (*execle_t)(const char* path, const char* arg0, ...); +execle_t orig_execle; +EXPORT int execle(UNUSED const char* path, const char* arg0, ...) { + va_list ap; + va_start(ap, arg0); + int argc = 1; + const char *arg, *tmp; + while ((tmp = va_arg(ap, char*))) { + arg = tmp; + argc++; + } + char** envp = va_arg(ap, char**); + va_end(ap); + + const char* sh_path = _PATH_BSHELL; + char shell[PROP_VALUE_MAX]; + shell[0] = 0; + __system_property_get("persist.sys.adb.shell", shell); + if (likely(shell[0] && access(shell, X_OK) == 0)) { + sh_path = shell; + } + + if (unlikely(!orig_execle)) { + errno = EINVAL; + return -1; + } + + int ret = -1; + if (likely(argc == 1 || argc == 2)) { + ret = orig_execle(sh_path, sh_path, "-", NULL, envp); + } else if (argc == 3) { + ret = orig_execle(sh_path, sh_path, "-c", arg, NULL, envp); + } else { + errno = EINVAL; + } + + return ret; +} + +CONSTRUCTOR UNUSED void adbex_adbd_main() { + klog(LOG_TAG, "injected into adbd"); + unsetenv("LD_PRELOAD"); + + void* libc = dlopen("libc.so", RTLD_NOW); + if (libc) { + orig___system_property_read_callback = + (__system_property_read_callback_t)dlsym(libc, "__system_property_read_callback"); + orig___system_property_read = (__system_property_read_t)dlsym(libc, "__system_property_read"); + orig___system_property_get = (__system_property_get_t)dlsym(libc, "__system_property_get"); + orig_execle = (execle_t)dlsym(libc, "execle"); + } + klog(LOG_TAG, "__system_property_read_callback: %p", orig___system_property_read_callback); + klog(LOG_TAG, "__system_property_read: %p", orig___system_property_read); + klog(LOG_TAG, "__system_property_get: %p", orig___system_property_get); + klog(LOG_TAG, "execle: %p", orig_execle); +} diff --git a/adbex_init.c b/adbex_init.c new file mode 100644 index 0000000..4e6fbb5 --- /dev/null +++ b/adbex_init.c @@ -0,0 +1,42 @@ +#include "utils.h" + +#include +#include +#include +#include + +#define LOG_TAG "[adbex][init]" + +#define ADBD_PATH_APEX "/apex/com.android.adbd/bin/adbd" +#define ADBD_PATH "/system/bin/adbd" + +char adbex_adbd[PATH_MAX]; + +int (*orig_execv)(const char* path, char* const argv[]); +int hook_execv(const char* path, char* const argv[]) { + if (unlikely(!strcmp(path, ADBD_PATH_APEX) || !strcmp(path, ADBD_PATH))) { + klog(LOG_TAG, "adbd pid: %d\n", getpid()); + setenv("LD_PRELOAD", adbex_adbd, 1); + return orig_execv(path, argv); + } + return orig_execv(path, argv); +} + +CONSTRUCTOR UNUSED void adbex_init_main() { + klog(LOG_TAG, "injected into init"); + + const char* adbex_path; + if (access("/sbin/adbex", F_OK) == 0) { + adbex_path = "/sbin/adbex"; + } else { + adbex_path = "/debug_ramdisk/adbex"; + } + snprintf(adbex_adbd, sizeof(adbex_adbd), "%s/libadbex_adbd.so", adbex_path); + klog(LOG_TAG, "adbex_adbd: %s", adbex_adbd); + + plthook_t* plthook; + int err = plthook_open_by_address(&plthook, (void*)get_module_base(1, "/init\n")); + klog(LOG_TAG, "plthook err: %d\n", err); + if (err) return; + plthook_replace(plthook, "execv", (void*)&hook_execv, (void**)&orig_execv); +} diff --git a/docs/details.md b/docs/details.md new file mode 100644 index 0000000..f0afac4 --- /dev/null +++ b/docs/details.md @@ -0,0 +1,52 @@ +# Internal Details + +## inject +An injector used to inject `libadbex_init.so` into `init` process using `ptrace`. + +## adbex_init +Hook `execve` to inject `libadbex_adbd.so` into `adbd` process using `LD_PRELOAD`. + +## adbex_adbd +Magic happens here. + +### ADB Root +Fake current os as userdebug. + +#### Fake properties +- ro.secure to 0 +- ro.debuggable to 1 +- service.adb.root to 1 +- ro.boot.verifiedbootstate to orange + +#### Fixup SELinux Policies +Add missing [SELinux policies](https://android.googlesource.com/platform/system/sepolicy/+/refs/heads/main/private/adbd.te) in production build. +``` +userdebug_or_eng(` + allow adbd self:process setcurrent; + allow adbd su:process dyntransition; +') +``` + +I don't want to fix it bit by bit, so simply set `su` and `adbd` to permissive: +``` +permissive { su } +permissive { adbd } +``` + +Fix init to adbd transition: +``` +allow init adbd process noatsecure +allow init adbd process2 nosuid_transition +``` + +Fix `adb install` failed/hang: +``` +allow system_server su fd use +allow system_server su unix_stream_socket { connectto getattr getopt ioctl read write shutdown } +allow system_server su binder call +``` + +### Custom Shell +Hook `execle` to replace shell with whatever we want. + +The shell path is read from property `persist.sys.adb.shell`, similar to LineageOS. diff --git a/external/plthook b/external/plthook new file mode 160000 index 0000000..290aac6 --- /dev/null +++ b/external/plthook @@ -0,0 +1 @@ +Subproject commit 290aac65aa18b074b3519abbea6d1f923a19b9bc diff --git a/inject.c b/inject.c new file mode 100644 index 0000000..19abde1 --- /dev/null +++ b/inject.c @@ -0,0 +1,118 @@ +#include "utils.h" +#include "ptrace.h" + +#include +#include +#include +#include + +#define LOG_TAG "[adbex][inject]" + +uintptr_t reg_stack_alloc(struct user_regs_struct* regs, size_t size) { + size = ALIGN_UP(size, sizeof(long)); + regs->REG_SP -= size; + return regs->REG_SP; +} + +int inject(pid_t pid, const char* path) { + klog(LOG_TAG, "pid: %d, path: %s\n", pid, path); + + Dl_info dl_info; + if (dladdr(&dlopen, &dl_info) == 0) { + klog(LOG_TAG, "can not find dlopen in injector process\n"); + return -1; + } + + uintptr_t local_libdl_base = (uintptr_t)dl_info.dli_fbase; + uintptr_t local_dlopen = (uintptr_t)&dlopen; + uintptr_t remote_libdl_base = get_module_base(pid, "/libdl.so\n"); + if (remote_libdl_base == 0) { + klog(LOG_TAG, "can not find libdl.so in target process\n"); + return -1; + } + uintptr_t offset_dlopen = local_dlopen - local_libdl_base; + uintptr_t remote_dlopen = remote_libdl_base + offset_dlopen; + klog(LOG_TAG, "remote libdl: %p\n", (void*)remote_libdl_base); + klog(LOG_TAG, "remote dlopen: %p\n", (void*)remote_dlopen); + + int path_size = (int)strlen(path) + 1; + int path_size_aligned = ALIGN_UP(path_size, sizeof(long)); + char path_aligned[PATH_MAX]; + memset(path_aligned, 0, PATH_MAX); + strcpy(path_aligned, path); + + if (ptrace_attach(pid)) { + klog(LOG_TAG, "failed to attach\n"); + return -1; + } + if (remote_wait(pid)) { + klog(LOG_TAG, "remote_wait failed\n"); + return -1; + } + + struct user_regs_struct old_regs, regs; + if (ptrace_getregs(pid, ®s)) { + klog(LOG_TAG, "failed to get registers\n"); + return -1; + } + memcpy(&old_regs, ®s, sizeof(struct user_regs_struct)); + + uintptr_t remote_path = reg_stack_alloc(®s, 1024); + ptrace_write(pid, remote_path, path_aligned, path_size_aligned); + + uintptr_t args[2]; + args[0] = remote_path; + args[1] = RTLD_NOW; + if (remote_call(pid, ®s, remote_dlopen, 2, args, remote_libdl_base)) { + return -1; + } + klog(LOG_TAG, "dlopen handle: %p\n", (void*)regs.REG_RET); + + int ret = 0; + + if (regs.REG_RET == 0) { + ret = -1; + + uintptr_t offset_dlerror = (uintptr_t)&dlerror - local_libdl_base; + uintptr_t remote_dlerror = remote_libdl_base + offset_dlerror; + if (remote_call(pid, ®s, remote_dlerror, 0, NULL, 0)) { + return -1; + } + if (regs.REG_RET) { + char buf[1024]; + buf[0] = 0; + ptrace_read(pid, regs.REG_RET, buf, 1024); + klog(LOG_TAG, "dlerror: %s\n", buf); + } else { + klog(LOG_TAG, "dlerror: NULL\n"); + } + } + + if (ptrace_setregs(pid, &old_regs)) { + klog(LOG_TAG, "failed to restore registers\n"); + return -1; + } + if (ptrace_detach(pid)) { + klog(LOG_TAG, "failed to detach\n"); + return -1; + } + + return ret; +} + +int main(int argc, UNUSED char* argv[]) { + if (argc != 3) { + klog(LOG_TAG, "usage: inject pid path\n"); + return -1; + } + + pid_t opt_pid = (pid_t)strtol(argv[1], NULL, 10); + const char* opt_path = argv[2]; + if (inject(opt_pid, opt_path)) { + klog(LOG_TAG, "inject failed\n"); + return -1; + } + + klog(LOG_TAG, "inject success\n"); + return 0; +} diff --git a/ndk.cmake b/ndk.cmake new file mode 100644 index 0000000..fd622b8 --- /dev/null +++ b/ndk.cmake @@ -0,0 +1,24 @@ +set(NDK_VERSION 26.2.11394342) +set(ANDROID_ARM_MODE arm) +set(ANDROID_ABI "arm64-v8a") +set(ANDROID_PLATFORM 23) + +set(ANDROID_SDK_ROOT "$ENV{ANDROID_SDK_ROOT}") +if ("${ANDROID_SDK_ROOT}" STREQUAL "") + if (WIN32) + STRING(REGEX REPLACE "\\\\" "/" USERPROFILE $ENV{USERPROFILE}) + set(PROGRAM_LIBRARY ${USERPROFILE}/AppData/Local) + elseif (APPLE) + set(PROGRAM_LIBRARY ~/Library) + endif () + set(ANDROID_SDK_ROOT ${PROGRAM_LIBRARY}/Android/Sdk) + if (NOT EXISTS ${ANDROID_SDK_ROOT}) + message(FATAL_ERROR "Please set ANDROID_SDK_ROOT environment variable") + endif () +endif () + +set(NDK ${ANDROID_SDK_ROOT}/ndk/${NDK_VERSION}) +if (NOT EXISTS ${NDK}) + message(FATAL_ERROR "NDK version ${NDK_VERSION} does not exist") +endif () +set(CMAKE_TOOLCHAIN_FILE ${NDK}/build/cmake/android.toolchain.cmake) diff --git a/package/.gitignore b/package/.gitignore new file mode 100644 index 0000000..c612a04 --- /dev/null +++ b/package/.gitignore @@ -0,0 +1,8 @@ +* +!*/ +!.gitignore +!META-INF/** +!customize.sh +!module.prop +!post-fs-data.sh +!sepolicy.rule diff --git a/package/META-INF/com/google/android/update-binary b/package/META-INF/com/google/android/update-binary new file mode 100644 index 0000000..28b48e5 --- /dev/null +++ b/package/META-INF/com/google/android/update-binary @@ -0,0 +1,33 @@ +#!/sbin/sh + +################# +# Initialization +################# + +umask 022 + +# echo before loading util_functions +ui_print() { echo "$1"; } + +require_new_magisk() { + ui_print "*******************************" + ui_print " Please install Magisk v20.4+! " + ui_print "*******************************" + exit 1 +} + +######################### +# Load util_functions.sh +######################### + +OUTFD=$2 +ZIPFILE=$3 + +mount /data 2>/dev/null + +[ -f /data/adb/magisk/util_functions.sh ] || require_new_magisk +. /data/adb/magisk/util_functions.sh +[ $MAGISK_VER_CODE -lt 20400 ] && require_new_magisk + +install_module +exit 0 diff --git a/package/META-INF/com/google/android/updater-script b/package/META-INF/com/google/android/updater-script new file mode 100644 index 0000000..492be83 --- /dev/null +++ b/package/META-INF/com/google/android/updater-script @@ -0,0 +1 @@ +#MAGISK \ No newline at end of file diff --git a/package/customize.sh b/package/customize.sh new file mode 100644 index 0000000..3ece0dd --- /dev/null +++ b/package/customize.sh @@ -0,0 +1,3 @@ +#!/bin/sh +set_perm_recursive "$MODPATH/bin" 0 0 0755 0755 +set_perm_recursive "$MODPATH/lib64" 0 0 0755 0644 u:object_r:system_file:s0 diff --git a/package/module.prop b/package/module.prop new file mode 100644 index 0000000..15d2cce --- /dev/null +++ b/package/module.prop @@ -0,0 +1,6 @@ +id=adbex +name=ADBEx +version=2024.03.22 +versionCode=202403220 +author=shatyuka +description=ADB Extension diff --git a/package/post-fs-data.sh b/package/post-fs-data.sh new file mode 100644 index 0000000..3075e07 --- /dev/null +++ b/package/post-fs-data.sh @@ -0,0 +1,12 @@ +#!/bin/sh +MODDIR=${0%/*} +cd "$MODDIR" || exit + +ADBEX_PATH=/sbin/adbex +[ -d /sbin ] || ADBEX_PATH=/debug_ramdisk/adbex + +mkdir -p $ADBEX_PATH +cp lib64/libadbex_init.so $ADBEX_PATH +cp lib64/libadbex_adbd.so $ADBEX_PATH +chcon -R u:object_r:system_file:s0 $ADBEX_PATH +./bin/inject 1 $ADBEX_PATH/libadbex_init.so diff --git a/package/sepolicy.rule b/package/sepolicy.rule new file mode 100644 index 0000000..681a613 --- /dev/null +++ b/package/sepolicy.rule @@ -0,0 +1,7 @@ +permissive su +permissive adbd +allow init adbd process noatsecure +allow init adbd process2 nosuid_transition +allow system_server su fd use +allow system_server su unix_stream_socket { connectto getattr getopt ioctl read write shutdown } +allow system_server su binder call diff --git a/prop_info.h b/prop_info.h new file mode 100644 index 0000000..233f668 --- /dev/null +++ b/prop_info.h @@ -0,0 +1,21 @@ +#pragma once + +#include +#include +#include + +#define kLongLegacyErrorBufferSize 56 + +typedef struct prop_info { + atomic_uint_least32_t serial; + union { + char value[PROP_VALUE_MAX]; + struct { + char error_message[kLongLegacyErrorBufferSize]; + uint32_t offset; + } long_property; + }; + char name[0]; +} prop_info; + +_Static_assert(sizeof(prop_info) == 96, "sizeof struct prop_info must be 96 bytes"); diff --git a/ptrace.c b/ptrace.c new file mode 100644 index 0000000..ebd2fc7 --- /dev/null +++ b/ptrace.c @@ -0,0 +1,155 @@ +#include "ptrace.h" +#include "utils.h" + +#include +#include +#include +#include +#include +#include + +int remote_call(pid_t pid, struct user_regs_struct* regs, uintptr_t func_addr, int argc, const uintptr_t* argv, + uintptr_t return_addr) { + if (argc >= 1) regs->REG_ARG0 = argv[0]; + if (argc >= 2) regs->REG_ARG1 = argv[1]; + if (argc >= 3) regs->REG_ARG2 = argv[2]; + if (argc >= 4) regs->REG_ARG3 = argv[3]; + if (argc >= 5) regs->REG_ARG4 = argv[4]; + if (argc >= 6) regs->REG_ARG5 = argv[5]; + + regs->REG_IP = func_addr; + +#ifdef __x86_64__ + regs->REG_SP -= sizeof(long); + ptrace_write(pid, regs->REG_SP, &return_addr, sizeof(return_addr)); +#elif defined(__aarch64__) + regs->regs[30] = return_addr; +#else +# error "Not supported" +#endif + + if (ptrace_setregs(pid, regs)) return -1; + if (ptrace_continue(pid)) return -1; + if (remote_wait(pid)) return -1; + if (ptrace_getregs(pid, regs)) return -1; + + return 0; +} + +int remote_wait(pid_t pid) { + while (1) { + int status; + pid_t err = waitpid(pid, &status, __WALL); + if (err == -1) { + if (errno == EINTR) continue; + printf("waitpid(%d) failed: %s(%d)\n", pid, strerror(errno), errno); + return -1; + } + if (!WIFSTOPPED(status)) { + printf("target process not stopped\n"); + return -1; + } + return 0; + } +} + +int ptrace_attach(pid_t pid) { + if (ptrace(PTRACE_ATTACH, pid, NULL, NULL) == -1) { + printf("ptrace(PTRACE_ATTACH) failed: %s(%d)\n", strerror(errno), errno); + return -1; + } + return 0; +} + +int ptrace_detach(pid_t pid) { + if (ptrace(PTRACE_DETACH, pid, NULL, NULL) == -1) { + printf("ptrace(PTRACE_DETACH) failed: %s(%d)\n", strerror(errno), errno); + return -1; + } + return 0; +} + +int ptrace_getregs(pid_t pid, struct user_regs_struct* regs) { +#ifdef __x86_64__ + if (ptrace(PTRACE_GETREGS, pid, NULL, regs) == -1) { + printf("ptrace(PTRACE_GETREGS) failed: %s(%d)\n", strerror(errno), errno); + return -1; + } +#elif defined(__aarch64__) + struct iovec iov; + iov.iov_base = regs; + iov.iov_len = sizeof(struct user_regs_struct); + if (ptrace(PTRACE_GETREGSET, pid, (void*)NT_PRSTATUS, &iov) == -1) { + printf("ptrace(PTRACE_GETREGSET) failed: %s(%d)\n", strerror(errno), errno); + return -1; + } +#endif + return 0; +} + +int ptrace_setregs(pid_t pid, struct user_regs_struct* regs) { +#ifdef __x86_64__ + if (ptrace(PTRACE_SETREGS, pid, NULL, regs) == -1) { + fprintf(stderr, "ptrace(PTRACE_SETREGS) failed: %s(%d)\n", strerror(errno), errno); + return false; + } +#elif defined(__aarch64__) + struct iovec iov; + iov.iov_base = regs; + iov.iov_len = sizeof(*regs); + if (ptrace(PTRACE_SETREGSET, pid, (void*)NT_PRSTATUS, &iov) == -1) { + printf("ptrace(PTRACE_SETREGSET) failed: %s(%d)\n", strerror(errno), errno); + return -1; + } +#endif + return 0; +} + +int ptrace_continue(pid_t pid) { + if (ptrace(PTRACE_CONT, pid, NULL, NULL) == -1) { + printf("ptrace(PTRACE_CONT) failed: %s(%d)\n", strerror(errno), errno); + return -1; + } + return 0; +} + +int ptrace_read(pid_t pid, uintptr_t addr, void* vptr, int len) { + int count = 0; + int i = 0; + long word = 0; + long* ptr = (long*)vptr; + + while (count < len) { + errno = 0; + word = ptrace(PTRACE_PEEKTEXT, pid, addr + count, NULL); + if (unlikely(errno)) { + printf("ptrace(PTRACE_PEEKTEXT) failed: %s(%d)\n", strerror(errno), errno); + return -1; + } + count += sizeof(word); + if (unlikely(count > len)) + memcpy(ptr + i, &word, sizeof(word) - (count - len)); + else + ptr[i++] = word; + } + return 0; +} + +int ptrace_write(pid_t pid, uintptr_t addr, const void* vptr, int len) { + int count = 0; + long word = 0; + + // TODO: + // assert(!(len % sizeof(word))); + + while (count < len) { + memcpy(&word, (const char*)vptr + count, sizeof(word)); + word = ptrace(PTRACE_POKETEXT, pid, addr + count, word); + if (unlikely(word == -1)) { + printf("ptrace(PTRACE_POKETEXT) failed: %s(%d)\n", strerror(errno), errno); + return -1; + } + count += sizeof(word); + } + return 0; +} diff --git a/ptrace.h b/ptrace.h new file mode 100644 index 0000000..7b063af --- /dev/null +++ b/ptrace.h @@ -0,0 +1,43 @@ +#pragma once + +#include +#include +#include + +#ifdef __x86_64__ +# define REG_RET rax +# define REG_ARG0 rdi +# define REG_ARG1 rsi +# define REG_ARG2 rdx +# define REG_ARG3 rcx +# define REG_ARG4 r8 +# define REG_ARG5 r9 +# define REG_IP rip +# define REG_SP rsp +#elif defined(__aarch64__) +# define REG_RET regs[0] +# define REG_ARG0 regs[0] +# define REG_ARG1 regs[1] +# define REG_ARG2 regs[2] +# define REG_ARG3 regs[3] +# define REG_ARG4 regs[4] +# define REG_ARG5 regs[5] +# define REG_IP pc +# define REG_SP sp +#else +# error "Not supported" +#endif + +#define ALIGN_UP(x, align) ((x + (align - 1)) & ~(align - 1)) + +int remote_call(pid_t pid, struct user_regs_struct* regs, uintptr_t func_addr, int argc, const uintptr_t* argv, + uintptr_t return_addr); +int remote_wait(pid_t pid); + +int ptrace_attach(pid_t pid); +int ptrace_detach(pid_t pid); +int ptrace_getregs(pid_t pid, struct user_regs_struct* regs); +int ptrace_setregs(pid_t pid, struct user_regs_struct* regs); +int ptrace_continue(pid_t pid); +int ptrace_read(pid_t pid, uintptr_t addr, void* vptr, int len); +int ptrace_write(pid_t pid, uintptr_t addr, const void* vptr, int len); diff --git a/utils.c b/utils.c new file mode 100644 index 0000000..7aef265 --- /dev/null +++ b/utils.c @@ -0,0 +1,47 @@ +// +// Created by shaty uka on 2024/3/20. +// + +#include "utils.h" +#include +#include +#include + +uintptr_t get_module_base(pid_t pid, const char* module) { + char filename[32]; + char line[1024]; + sprintf(filename, "/proc/%d/maps", pid); + FILE* fp = fopen(filename, "r"); + if (fp == NULL) return -1; + + uintptr_t addr = 0; + char perms[5]; + while (fgets(line, sizeof(line), fp)) { + sscanf(line, "%lx-%*lx %s %*s %*s %*d", &addr, perms); // NOLINT(*-err34-c) + if (strstr(line, module)) { + break; + } + } + + fclose(fp); + return addr; +} + +size_t klog(const char* tag, const char* fmt, ...) { + static int kmsg_fd = -1; + if (unlikely(kmsg_fd == -1)) { + kmsg_fd = open("/dev/kmsg", O_WRONLY | O_CLOEXEC); + if (kmsg_fd == -1) return -1; + } + + char buf[1024]; + size_t offset = 0; + offset += strlcpy(buf, tag, sizeof(buf)); + offset += strlcpy(buf + offset, " ", sizeof(buf) - offset); + va_list ap; + va_start(ap, fmt); + offset += vsnprintf(buf + offset, sizeof(buf) - offset, fmt, ap); + va_end(ap); + write(kmsg_fd, buf, offset); + return offset; +} diff --git a/utils.h b/utils.h new file mode 100644 index 0000000..759d407 --- /dev/null +++ b/utils.h @@ -0,0 +1,12 @@ +#pragma once +#include + +#define likely(x) __builtin_expect(!!(x), 1) +#define unlikely(x) __builtin_expect(!!(x), 0) + +#define UNUSED __attribute__((unused)) +#define CONSTRUCTOR __attribute__((constructor)) +#define EXPORT __attribute__((visibility("default"), unused)) + +uintptr_t get_module_base(pid_t pid, const char* module); +size_t klog(const char* tag, const char* fmt, ...) __attribute__((format(printf, 2, 3)));